Expose whether unittest failed to tearDown().

Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test fails.
In such a case, original failure exception would be overwritten, hiding real
cause and confusing developer who is trying to make sense of it.

Example: thread watcher, checks that all new threads are terminated before 
test finishes: https://codereview.chromium.org/2127943002/

BUG=

Committed: https://chromium.googlesource.com/infra/testing/expect_tests/+/b125b3d0b93c533f72bee3d3725fec5aeaa5d3a2

[tandrii(chromium), 2016-07-06 16:35:53]

tandrii@chromium.org changed reviewers:
+ sergiyb@chromium.org

[tandrii(chromium), 2016-07-06 16:35:53]

PTAL

this is to make https://codereview.chromium.org/2127943002/ useful when tests
are run by expect_tests.

[tandrii(chromium), 2016-07-06 16:36:15]

Description was changed from

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and making confusing developer doing trying to make sense of failure.

Example: thread watcher, checks that all new threads are terminated before
test finishes.

BUG=
==========

to

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and making confusing developer doing trying to make sense of failure.

Example: thread watcher, checks that all new threads are terminated before 
test finishes.
CL: ttps://codereview.chromium.org/2127943002/

BUG=
==========

[Sergiy Byelozyorov, 2016-07-06 16:43:06]

Description was changed from

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and making confusing developer doing trying to make sense of failure.

Example: thread watcher, checks that all new threads are terminated before 
test finishes.
CL: ttps://codereview.chromium.org/2127943002/

BUG=
==========

to

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and confusing developer who is trying to make sense of failure.

Example: thread watcher, checks that all new threads are terminated before 
test finishes.
CL: https://codereview.chromium.org/2127943002/

BUG=
==========

[Sergiy Byelozyorov, 2016-07-06 16:43:18]

Description was changed from

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and confusing developer who is trying to make sense of failure.

Example: thread watcher, checks that all new threads are terminated before 
test finishes.
CL: https://codereview.chromium.org/2127943002/

BUG=
==========

to

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and confusing developer who is trying to make sense of it.

Example: thread watcher, checks that all new threads are terminated before 
test finishes.
CL: https://codereview.chromium.org/2127943002/

BUG=
==========

[Sergiy Byelozyorov, 2016-07-06 16:43:30]

Description was changed from

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and confusing developer who is trying to make sense of it.

Example: thread watcher, checks that all new threads are terminated before 
test finishes.
CL: https://codereview.chromium.org/2127943002/

BUG=
==========

to

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and confusing developer who is trying to make sense of it.

Example: thread watcher, checks that all new threads are terminated before 
test finishes: https://codereview.chromium.org/2127943002/

BUG=
==========

[Sergiy Byelozyorov, 2016-07-07 07:04:47]

lgtm

[tandrii(chromium), 2016-07-07 09:00:04]

The CQ bit was checked by tandrii@chromium.org

[commit-bot: I haz the power, 2016-07-07 09:00:09]

CQ is trying da patch.
Reference: codereview.chromium.org/2121343004/1

[commit-bot: I haz the power, 2016-07-07 09:00:17]

Description was changed from

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and confusing developer who is trying to make sense of it.

Example: thread watcher, checks that all new threads are terminated before 
test finishes: https://codereview.chromium.org/2127943002/

BUG=
==========

to

==========
Expose whether unittest failed to tearDown().

Use-case: check performed in tearDown() that fails because the actual test
fails.
In such a case, original failure exception would be overwritten, hiding real
cause and confusing developer who is trying to make sense of it.

Example: thread watcher, checks that all new threads are terminated before 
test finishes: https://codereview.chromium.org/2127943002/

BUG=

Committed:
https://chromium.googlesource.com/infra/testing/expect_tests/+/b125b3d0b93c53...
==========

[commit-bot: I haz the power, 2016-07-07 09:00:18]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/infra/testing/expect_tests/+/b125b3d0b93c53...